AS TITLE SAYS ON MY 97 CH613. I WAS WOUNDERING IF SOMEONE HARE CAN CONFIRM IF I'M RIGHT OR WRONG OR, IF THERE IS A OTHER SOLUTION TO THIS PROB THAT IS NOT TOO EXPENSIVE. WHEN TRUCK IS IDLE AT 600 FOR MORE THEN 5 MIN IT PUSHES ANTIFREEZE OUT TO TOP TANK THEN IT GOES TO THE OVERFLOW TANK AND FINALLY SHOOTS OUT THRU A SMALL HOLE IN PLASTIC CAP. WHEN I IDLE AT 1000 AND ABOVE OR JUST DRIVE IT, THEN I NEVER HAVE A PROBLEM WITH OVERHEATING NOR LOOSING ANTIFREEZE. I HAVE REPLACED A WATER COOLER, A TOP TANK CAP, TOOK A THERMOSTAT OUT, FLUSHED A SYSTEM AND CHECKED A RADIATOR FOR LEEKS. EVERYTHING IS NORMAL, THE ONLY THING THAT I HAVE NOT DONE IS THE HEAD GASKET. IF THERE IS OTHER WAY OF FIXING IT WITHOUT REPLACING A HEAD GASKET THEN PLEASE HELP. I DON'T HAVE A TIME AND MONEY TO INVEST IN THIS TRUCK AT THIS TIME, IT DRIVES NORMAL WHEN RPM'S ARE ABOVE 1000. THANKS, RAF.